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JAS. A. CUTTING,`

OF PHILADELPHIA, PENNSYLVANIA.

SPARK-ARRESTER.

-\' c Specicaton of Letters Patent No. `8,0'77', dated May 6, 1851.

To all whom t may concern ,n

Be it.` known that I. JAMES A. CUTTING, of the city` and county of Philadelphia and State ofPennsylvania, have invented new and useful Improvements in VSpark-Arresters; and I do hereby declare the follow* ingtobeanfull, clear, and exact descrip- 1- tionof the same, reference being had tolthe accompanying drawings, making a part thereof, in which-I- Figure l, is a vertical section; Fig. 2, a view of the diaphragm with its curved and inclined planes `separating the outer from the inner chambers, and exhibit-ing a View of the ventilators or air lues in the lower or inclined section, Fig. 3, is a ho-rizontal View of the underside of Fig. 2, showing a series of ventilators or air lues and the curved plane. Fig. l, is a perspective view of a section showing the .combination of the different parts. F ig. 5, is a horizontal view taken at the line a, a, of Fig. 6, showing the air flue, and the entrance of the Ventilating tubes. Fig. 6, is a vertical section of the chimney in combination with the ventilating' tubes and air chambers. y

The same letters in the several figures represent the sameparts. y

The nature of the first part of my invention consists in arranging upon the outside of the inclined plane at the base of the diaphragm, a series of air flues, extending from the spark chamber through the diaphragm, the mouthsof said fines being in the spark chamber, and their exits in the diaphragm, so that the rotary current of steam, &c., through a series of curved 'lues in said diaphragm will pass over the exits of said air lues, causing aacurrent of air tobe drawn from said spark chamber through said air lues in the direction of the currentof steam &c, for the purpose of creating a `partial vacuum in said spark chamber into which the sparks fall. And in order to effect the deposit of such light particles as may possibly reach the top of the diaphragm the nature of the second part of myinvention consists in arranging an air chamber with# in the diaphragm at the top of the stack, which chamber is ventilated or exhausted, by 'means of tubes connecting the chamber `with the air flue at the bottom of the chamber at the top of the chimney.

To enable others skilled in the art to make and use my invention, I will proceed to describe the `same with `in the `diaphragm (O). provided with a series chimney (A.) ,the effect of drawing a current` of air be tweenthe curved plane (K) and the chim reference to the 'drawings. x At thetop of the chimney\(A) I .place an air chamber (B,) over which I place a ldeflecting cone (C), in the form of a funnel, with the outer edges turned down all around uniformlv, to reverberate the steam,

1 gases and` particles, and throw them into'a i series of curved andinclined lues (D)` sur-- rounding the air chamber (B) `by which a whirling or rotary motion isproduced withL This diaphragm, is of apertures (G). The exhaust steam in passing through the into the air chamber (B) has ney (A) through the air i'lues (F) out of the spark chamber (J).

The air fines (F) are arranged on the outer side of the inclined plane (E) at the base of the diaphragm, and the chamber (J) through the diaphragm (O). The mouths a, of the lues F, are in thespark chamber, J, and theirexits o, in the diaphragm (O), the current of air extend from` through them being in the direction of the current of steam passing through the inclined `lues (D), as shown by the arrows, so as to allow the air to pass out from, and prevent the sparks &c from passing into-` the spark chamber through said flues F.

At the bottom of the diaphragm (O) under the series of curved and inclined lues (D) is a curved plane (K) and an. inclined plane (E). In the inclined plane (E) is placed the series of `iiues (F) above described. The eifect of the passage of thev circular current of steam @ze within the diaphragm (`O)and over the air flues (F,) is to still further exhaust the spark chamber (J) p of its air, on the same principle that `the, spark chamber (J) is ventilatedby the passage of steam &c over the air flue (P) (shown `by dotted lines in Fig. 6,) at the bottom oftheair chamber (B). y

The circular current has the 'tendency by its centrifugal force to throw the particles off in a tangent, against the inner walls of the `diaphragm (0) and through the aper-` tures (G)into the outer oryspark chamber (J). The depositof the sparks &c, inthe spark chamber (J) is greatly facilitated by the action of the partial vacuum in the ,y

spark chamber (J), by `which a draft isv occasioned through the apertures (G) of the diaphragm (O) toward said spark chamber-(J). f

It Will be seen that the spark chamber (J) is exhausted of its air, in part, by every 'pulsation of exhaust steam, consequently between every pulsation there Will be a drafttoward the spark chamber (J), through the air flue (P) as Well as through the apertures (G) of the diaphragm (O). This draft through the air flue (P), toward the spar'lr chamber (J) Will have the effect to create a draft upward through the chimney (A) by Which the draft of the furnace Will be, to a great extent regulated, and the heat correspondingly increased.

Fig. 6, represents the chimney (A), with the air chamber (B) in connection with the pipes (H,) Which pass to another air chamber (I), at the top of the stack. The passage of the steam through the chimney (A) tends to draw a current of air through the pipes I-I, in the same manner in which the ventilation of the spark chamber (J) is effected, the result of Which is to exhaust the air chamber (I) of a portion of its air. This air chamber I, is provided with apertures (g), the object of which is to arrest such light particles as may possibly reach the top of the stack, and cause them to pass around again With the view of their being deposited. (L) is the general outlet of the steam and such gases as may be evolved.

Having thus fully described my invention, What I claim therein as new, and de sire to secure by Letters Patent is- 1. The air lines (-F) in the lower part of the diaphragm (O) constructed in the manner and'for the purposes herein described.

2. I claim the pipes or conductors in combination With the air chambers (I) and (B) arranged substantially as herein described.

3. I claim the combination and arrangement of the air flues F, With the air chamber (B), reverberating cone (C), inclined and curved flues (D), for the purpose, and inthe manner herein fully set forth and described.

- JAMES A. CUTTING.

Witnesses:

A. B. STOUGHTON, I. REHN. 

